Google Sign-In Silent Login Fails After First-Time Login in Unity (Need Sample Unity Package)

[shiva30122]

I am integrating Google Sign-In authentication in Unity and need a simple demo project (Unity package) to make integration easy for others like me.

My Requirements:

I am using only WebClientId to retrieve the ServerAuthCode.

I do NOT need Firebase Auth just ServerAuthCode for PlayFab authentication.

First-time login works, but Silent Login (SignInSilently) fails after reopening the app.
I am using the latest Google Play Services Auth & Credential Manager API in my Unity project.
Issue Details:
On first-time login, everything works fine:
✅ User signs in
✅ ServerAuthCode is retrieved
However, when I close and reopen the app, silent login fails with this error:

Unity AndroidJavaException: java.lang.NullPointerException
Exception of type 'Google.GoogleSignIn+SignInException' was thrown.
onFailure class androidx.credentials.exceptions.GetCredentialCancellationException : activity is cancelled by the user.
Expected Solution:
A sample Unity project (.unitypackage) with proper Google Sign-In integration.
Ensure Silent Login works consistently after reopening the app.
Only retrieve ServerAuthCode (not Firebase authentication).
Use latest Credential Manager API for authentication.
Extra Notes:
My dependencies (dependencies.xml) include:xml

I have verified my WebClientId is correct.
I need a working Unity sample to easily integrate and test.

📌 Please provide a working Unity Package (.unitypackage) sample!
Would really appreciate help on fixing Silent Sign-In issues after app restart! 🚀🔥

[shiva30122]

Normal Login

Silent Login Popup top down !!

and the sample unity is also not working !....

any one can explain what mistake i did ???
steps to proper one by one pleaseeeee

give proper unity.package from scratch that has the hole project !!!!!...

and also a VIDEO hoe to Implement Google Sign YOUTUBE Video or any Platform !!!!>>>>......